Slag pocket



SLAG POCKET.

APPLlcAnoN FILED ocT i4, 1920l` A W- SMITH.

SLAG POCKET.

APPLICATION FILED 0ST I4, w20.

menasept. 5,. 1922 3 SHEETSHSHEET 2! @mmm A. W.y SMITH.

SLAG P0 APmcATloN FILED 14. 192m l1,427,862, PatentedSept. 5, 1922. 3 SHEETS-SHEET 3.

nm Mm amm ma www y which the .followingis a full,

Patented Sept 5, 1922a ALBERT w. snurir, or -Younesrown omo.

YSLAGV POCKET.

Application filed October y14,11920.` ,'Serial'No. `416,754.

To all whom t may concern.' Be it known that I, ALBERT 1V. SMITH, a citizen of the United States, residing at lounn'stown, county of Mahoning, and State of Ohio, have invented anew and useful Improvement in SlagP Pockets,r of clear, and eXact description.

My invention relatesto slagr pockets yusedy in .open hearth or otherfurnaces. y f.

yln the usual operation of 4an open hearth furnace `for the manufacture of steel, the removal ofslag Afrom the slagpoclets necessitatesa periodical stopping and cooling of the furnace so that the slag` may beireinoved. This isnot only destructive tothe customary, brick work of the pockets but is very expensive and also reduces the production `by stopping the operation of the furnace.

vlleietofore attempts have been made to remedy the difliculties referred to, but without success.

` l have devised the arrangement shown in the drawings and hereinafter described to overcome the difliculties above set forth and find that bythe use of my invention much time and expense are saved in .the operation ofthe furnace rto which Plied.

lvlyinvention will be better understoodfbv reference to the accompanying `drawings forming a part hereof and in which :l

Figure lisa sectional elevation of portion of a furnace having aslag` pocket einbodying myv invention.

Figure 2 is a sectional view taken on line 11H11 of Figure 1;

Figure 3 is a section of the slag pocket on line III-HI of Figure 1; and

Figures t, 5 and G are detailed perspective views of the slag` receptacles.

lilly invention may be applied to any open hearth furnace and therefore a detail description of the parts of the furnace shown in the drawings other than the slag pocket need not be entered into. The furnace has the usual air ducts 1, as shown in Figure 1, and the gasduct 2, as shown in Figure 2, and also the ordinary walls 3 of any suitable material or construction desired.

The furnace is set upon the usual foundation 11. Placed upon the bottom wall 3 are steel rails 5. Placed upon the rails 5 are suitable slabs 6, 7 and 8. Upon the slab 8 is placed a receptacle 9, upon the slab 7 a `my invention is ap-v receptacle 1() and `upon the slab `6 va recep` tacle '11.; 'Atoneendiof the furnaceisgprovided ajbull head 12-which11nay be lremoved without injury to the furnace.A This bull; head constitutes/one endof` the receptacle 9, the saidueceptacle havinganopfposite end 13 and two sides 14 and a bottonr'l, as shown in Figure@ The I.receptacles :10 and 11a1esubstantally y,like receptacle 9, except that receptacle l10 has two similarfends 16 and two sides 17 similarto fthe sides 14 of the k.receptacle 9. It will be noted that the end 13of receptaclef9, and theends 16 of receptacle y10 are lower than the respective sidesofthe tworeceptacles. e The receptacle 11 hasone end 18 of the sameheight as the ends 13and 16 oftheother `receptacles and the other end 19i'ofthereceptacle 111 -is the same. height as the sides 20,-which,1in turn are the same inheight asthesides ofthe recep-y taclesjl 9` and 10. p Each kof -rthese Areceptacles is provided along` itssides and one end with a fia-nge v21.. Thegpurpose ofthisliange will appear later, y p 1? f The receptacles l9, .10 and '11 are p placed on lthe respective slabs asiabove described, and .between theadjacent ends of the receptacles 'is placed a thin layer of non-fusible material `22 such as chrome ore, coke or gas producer flue dust., y Chrome ore pis preferred. This :layer of 4non-fusible material is the. saine widthas theyiiange 21' and in factvfills ythe lspacefbetween the .adjacent "reof each of the receptacles and the permanent structure of the furnace. The only point not provided with this non-fusible material is the end of the receptacle 9, which is constituted by the temporary bulk head 12. Placed in the bottoni of each of the receptacles is a layer of any suitable material 23, such as silica sand. The adjacent walls between the receptacles are capped with silica bicks 24. The tops of the side walls are also capped with silica bricks 25 to keep the slag from penetrating the space filled with the non-fusible material. The permanent walls of the slagI pocket are built so that the pocket tapers, that is to say the pocket is wider atvthe end nearest the bulk head 12 than it is at the other end, so that when the slagis being` removed the receptacle 9 may be first taken out after demolishing the bulk head and the other receptacles 10 and l1 may be easily withdrawn because the pocket gradually increases in width toward the end where the bulk head is placed. By providing a layer of non-fusible material between the adjacent receptacles and also between each receptacle and the permanent walls of the furnace and capping the side walls and adjacent ends, the receptacles containing the slag may be easily remo-ved from the pocket as separate units, and by this construction the slag which falls into the adjacent receptacles is prevented from fusing together and forming a solid mass of large dimensions which would be very diliicult to remove Without injrjring the permanent structure of the furnace.

In operation the temporary silica bulk head 12 is removed and crane hooks or other means are attached to the slag in the compartment 9. A pull to the right, in the structure, as shown in Figure 3, will shear the capping bricks and the division wall around the compartment 9, allowing the receptacle 9 containing slag to be removed as a unit, taking with it the temporary side wall, division wall and the bottom lining 0f brick and sand. By asimilar operation the other compartments 10 and 11 may be re-l moved and when this has been done new receptacles may be placed in position and built up as heretofore described.

From the foregoing it will be evident that many advantages result from the construction described and that the efficiency of the furnace is increased because of the facility with which the slag may be removed therefrom. i

I claim:

1. A slag pocket for open hearth and other furnaces, comprising a plurality of receptacles, a compartment receiving said receptacles, said compartment gradually increasing in width towards the exit end thereof, substantially as described.

2. A slag pocket for open hearth and other furnaces, comprising a plurality of receptacles, a compartment receiving said receptacles, a permanent wall at one end of said compartment, a bulk head at the other end thereof, said compartment gradually decreasing inl width from said bulk head to said permanent wall, substantially as described.

A slag pocket for open hearth and other furnaces, comprising a compartment, rails in said compartment, a plurality of slabs on said rails, a receptacle on each slab, a layer of non-fusible material between each pair of adjacent receptacles, said compartment gradually increasing in width toward the eXit end thereof, substantially as described.

4l. A slag pocket for open hearth and other furnaces comprising a plurality of integral slag receptacles operating'independently of each other, a compartment holding said receptacles and increasing in width toward the exit end thereof to allow the ready removal of said receptacles when containing slag, substantially as described.

5. A slag pocket for open hearth and other furnaces, comprising a plurality of integral receptacles, each having a flange extending around three sides near the bottom thereof and acting to separate said receptacles from each other and the permanent walls of the furnace, non-fusible material filling the space between the receptacles and that between each receptacle and the permanent walls of the furnace, and means for protecting said non-fusible material from direct contact with the slag, substantially as described.

In testimony whereof, I have hereunto set my hand.

ALBERT YV. SMITH. 

